NAME¶
dtk_create_shape - Create and modify custom shape
SYNOPSIS¶
#include <drawtk.h>
dtk_hshape dtk_create_shape(dtk_hshape shp,
unsigned int ind_num, const float
*vertex_array,
int filled, const float *color);
DESCRIPTION¶
dtk_create_shape() creates a shape specified by
ind_num vertices
referenced by
vertex_array. In this array, the position parameters
(x,y) of each vertex are packed together and the list should ordered, so that
the array is filled in the following way: x0,y0,x1,y1,x2,y2,...,xN,yN.
shp,
filled and
color have the same usage and meaning as
for other shape creation function:
- *
- shp can be used to modify a previously created shape. If it is
non-null, the handle will be used to modify the shape referenced by
shp: no new shape is created and the returned value is ensured to
be shp in case of success, NULL otherwise. If shp is
NULL, the function will attempt to create a new shape.
- *
- filled is set to 0 if the described shape should be a continuous
line or a non-null value if the shape is supposed to be filled polygon. In
the case of filled polygon request, the last point specified in
vertex_array will be connected with the first one.
- *
- color should point to a 4 float array containing a normalized RGBA
value (i.e. each component is between 0.0 and 1.0).
RETURN VALUE¶
In case of success these functions return the handle to the newly created or
modified shape. If the
shp argument is non-null, the handle returned is
the same value. In case of error,
NULL is returned.
SEE ALSO¶
dtk_destroy_shape(3)